early august just after officials first learned of this latest alleged plot. young people are groomed, radicalized, and prepared for the so-called holy war, a german official said in announcing the closure. we can't accept this happening in front of our eyes right in the middle of hamburg, and that's why we have closed this mosque today and have banned the cultural association, he says. officials now believe at least one team of german jihadists was dispatched to europe over the summer, traveling on german passports which require no visa to enter the u.s. >> the american authorities are extremely nervous about what is going on, the germans are extremely nervous about what is going on. >> reporter: the fears of an attack similar to what happened in mumbai, india, two years ago. u.s. law enforcement officials say the captured german said the new attack would be a commando-style raid against what were described as soft or economic targets. the attacks in mumbai were against hotels frequented by tourists. >> we are all seeing increased activity by a more diverse set of groups and a more d